In the fourth book of the "Dinosaur Adventure series," Daniel finds himself back in the one place he vowed never to return to the Cretaceous Period 65 million years ago). At the start of the book, the Paleontological tourism camp that his family co-owns has a rare fossil stolen, ripped carelessly from the ground. The local RCMP is stumped, and what further complicates matters is that a local man is missing. Did he steal the fossil?